Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N1OSP callsign genealogy
Currently held by DENNIS, MICHAEL A
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by N1OSP's current licensee, walking backwards.
- DENNIS, MICHAEL ACTgranted 2013-08-20cancelled 2017-02-17
Successor callsigns
Callsigns held now by people who previously held N1OSP.
- DENNIS, MICHAEL ACTgranted 2013-08-20cancelled 2017-02-17
All historical holders
Every license row we've seen with the callsign N1OSP, oldest first.
- DENNIS, MICHAEL A CT2013-01-14 → cancelled 2013-08-20
- DENNIS, MICHAEL A CT2017-02-17 active